Handheld vacuum cleaner



FIG. 1 is a top, front perspective view of a handheld vacuum cleaner showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a front view thereof.

The elements shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM We claim the ornamental design for a handheld vacuum cleaner, as shown and described. 